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Titolo:
First results of UVES at VLT: revisiting RR Tel
Autore:
Selvelli, PL; Bonifacio, P;
Indirizzi:
CNR, GNA, Osservatorio Astron Trieste, I-34131 Trieste, Italy CNR Trieste Italy I-34131 vatorio Astron Trieste, I-34131 Trieste, Italy Osservatorio Astron Trieste, I-34131 Trieste, Italy Osservatorio Astron Trieste Trieste Italy I-34131 I-34131 Trieste, Italy
Titolo Testata:
ASTRONOMY AND ASTROPHYSICS
fascicolo: 1, volume: 364, anno: 2000,
pagine: L1 - L5
SICI:
0004-6361(200012)364:1<L1:FROUAV>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
TELESCOPII; LINES;
Keywords:
stars : novae; cataclysmic variables; stars : individual; line : identification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Selvelli, PL CNR, GNA, Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34131 Trieste,Italy CNR Via GB Tiepolo 11 Trieste Italy I-34131 31 Trieste,Italy
Citazione:
P.L. Selvelli e P. Bonifacio, "First results of UVES at VLT: revisiting RR Tel", ASTRON ASTR, 364(1), 2000, pp. L1-L5

Abstract

We present here the first results of UVES observations of RR Tel. The exceptional performances of the instrument have allowed the detection of new spectral features and have led to an improvement in the identifications of several emission lines. A direct comparison with the IUE observations in the range 3045-3300 Angstrom has revealed the appearance of many weak and shallow lines, most of them lacking a convincing identification. The Balmer lines are visible up to H-38 and are accompanied by the He II lines of the Pickering series. Also, all of the He II emissions of the Pfund series, from 5858 Angstrom to 6408 Angstrom have been detected. We made definite identifications of additional TiO bands at 4955 Angstrom (alpha R-2 1 - 0), 5167 Angstrom (alpha R-2 0 - 0), 5445 Angstrom (alpha R-2 0 - 1), 5598 Angstrom (beta R-1 0 - 0), 5847 Angstrom (gamma' R-1 1 - 0), and 6148 Angstrom (gamma'(S) R-21 0 - 0). The H alpha line has very wide wings, extending to at least5000 km s(-1), which are similar to those reported for the planetary nebula IC 4997 and attributed to Raman scattering by Ly beta photons. A selective pumping mechanism via the HeII 237 Angstrom emission is proposed to explain the intensity of the high-lying lines of (C) TV mult. 1 and 2.

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Documento generato il 19/09/20 alle ore 14:41:50